diff --git a/tox.ini b/tox.ini
index 306d9140a8fe..3e19b48b6ba7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -12,6 +12,8 @@ setenv =
     MPLCONFIGDIR={envtmpdir}/.matplotlib
     PIP_USER = 0
     PIP_ISOLATED = 1
+    SETUPTOOLS_SCM_PRETEND_VERSION_FOR_MATPLOTLIB = 0.0.0
+
 usedevelop = True
 commands =
     pytest --pyargs matplotlib.tests  {posargs}